Antoine bureau



2 Sheets-Sheet 1.

(No Model.)

A. BUREAU. ELECTRIC ARC LAMP. No. 584,983. Patented June 22,1897.

(N0 Mudel.) 2 SheetsSheet 2.

A. BUREAU.

ELECTRIC ARC LAMP.

No. 584,983. Patented June 22, 1897.

UNITED STATES ANTOINE BUREAU, OF BRUSSELS, BELGIUM.

ELECTRIC- SPECIFIOATION forming part of Letters ARC LAM P.

Patent No. 584,983, dated June 22, 1897.

Application filed January 2'7, 1897. Serial No. 620,850. (No model.) Patentedin England August 9,1893,1 T0. 15,231.

To aZZ whom it may concern.-

Be it known that I, ANTOINE BUREAU, engineer, administrator of the Socit Anon yme lArc Voltaique at Brussels, a subject of the King of Belgium, residing in Brussels, Belgium, have invented certain new and useful Improvements in Electric Lamps, (for which a patent has been granted in Great Britain, No. 15,231, dated August 9, 1893;) and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as will enable others skilled inthe art to which it appertains to make and use the same, reference being had to the accompanying drawin gs, and to letters of reference marked thereon, which form a part of this specification.

The object of my present invention is to provide an electric-arc lamp with means for regulating the distance between the two carbons of simple, strong, and durable construction, reliable and automatic in operation.

The invention consists in the improved automatic regulator for arc-lamps, in its connection with an electric circuit and a shunt circuit, and in the combination and arrange ment of the various parts thereof, substantially as will be hereinafter more fully described, and finally embodied in the clauses of the claim.

In the accompanying drawings, Figure l is a side elevation of my improved regulating mechanism, only those parts of the arc-lamp being shown which are necessary to fully illustrate the nature of my said invention; Fig. 2, a side elevation of Fig. 1 with certain portions removed and others broken away; Fig. 3, a top plan view of Fig. 1; Fig. 4:, a diagrammatic view illustrating the interposition of the various parts of the regulator and its connection with the electric circuit; and Figs. 5 and 6, detail views of the carbon clamp or support, as will be described hereinafter.

In said drawings, A represents the frame supported by standards B, which latter support and guide the carbon holders or clamps, as in the usual and well-known construction, and therefore notillustrated in the drawings. Said carbon holders or clamps are connected by a cord or chain I'I, passing over the double grooved pulley N. On the frame A are arranged the electromagnets t', t", and F, the

latter two of which are differentially wound. Said electromagnets are adapted to control an armature 71, carried by and projecting from the rear end of the frame L L, mounted on the shaft or axle O, which latter has its bearings in brackets projecting upward from the frame A. On the shaft 0, on which is mounted the double-grooved pulley N, is also secured a gear-wheel M, meshing into pinion P on a shaft having its bearings in the fulcrumed frame L L. 011 said latter shaft is secured a gear-wheel Q, meshing into pinion S, mounted on a shaft also having its bearings in said fulcrumed frame and carrying a brake-wheel or drum U. Pivotally secured to the under side of an insulating-block V (supported by suitable brackets) as at V, is the metallic brake or lever V, the swinging motion of which is regulated by means of the thumb-screw V as clearly shown in Fig. 1.

On the forward end of the f ulcru med frame L L is arranged a set-screw, on which is secured one end of a spiral spring I), the other end of which is connected to a screw-threaded vertically arranged pin f, penetrating the frame A and adapted to be regulated by means of the nut e, as will be manifest.

Binding-posts Z and Z" are arranged on the bed-plate A (one of which is insulated therefrom) and are adapted to be connected with a source of electricity in the usual manner and with the various parts of my improved regulator, as follows: A wire P connects the binding-post Zwith one end of the wire or coil P of the electromagnet 1', the other end of which is connected with one end of the coil P of the electromagnet i. The other end of said coil P is connected with the fulcrum V of the brake or lever V and the latter with the coil of the electromagnet i The free end of the coil of electromagnet i is connected with the binding-post Z,and said binding-post, through the frame A, with which latter it is in metallic contact, as indicated by the dotted line P with the brakewl1eelU, all as clearly shown in Fig. at.

The swinging movement of the fulcrumed frame L is limited by means of the projecting portion g of the armature h striking against the frame A, and, on the other hand, by vmeans of a pin arranged in the standard 0, as will be manifest.

In Figs. 5 and 6 is illustrated a clamp or holder for the carbons and preferably used in connection with my improved regulator. On the frame 1 is arranged a substantially U- shaped springplate WV, to which are secured the metallic cylinders 09 an, adapted to engage the carbon. (Shown in section.) By simply pressing against the projecting end IV of the spring-plate IV the latter is opened and the carbon can be conveniently removed, replaced, or readjusted.

In operation when the carbons are in normal working orderthat is to say, not in 0011- tact with each otherthe shunt-circuit passes through the electromagnets i and 2". The path of said circuit is as follows: binding-post Z, wire P, coil P wire P coil P wire P brake or lever V, brake-wheel U, connection P and bindingpost Z. The cores K and K attract the armature h, thus drawing the right end of the fulcrumed frame L L downward, whereby the brake-wheel U disengages the brake or lever V. The gear-wheels begin to turn, and as the grooved pulley is also rotated the rope or chain H causes the carbons to come closer together. IVhe'n the said brake- Wheel disengages the brake or lever V, the circuit just described is broken and completed through the coil of the electromagnet The path is then as follows: binding-post Z, wire P", coil P wire P coil P wire P", coil of electromagnet 2' and binding-post l. The resistance is thus increased and the shuntcircuit weakened and the fulcrumed frame L allowed to return to its normal positions. As soon as the brake-wheel U again engages the brake or lever V, the rotation of the gearwheels and thus ofthe grooved pulley N is stopped. The carbons are thus securely held at a uniform distance apart until the operation above described is automatically repeated. As the carbons are being used up, the resistance in the arc is increased, thus naturally in creasing the strength of the shuntcircuit passing through the electromagnets 2' and 2". The armature is again attracted, and as the brake-wheel Udisengages the brake or lever V the grooved pulley is allowed to rotate, causing the carbons to come closer together.

By the above arrangement the carbons are continuously moved toward each other and the distance between them is thus kept uniform.

By the engaging and disengaging of the brake-wheel U with and from the brake or lever V a second shunt-circuit through electromagnet 4 is closed and broken, respectively, which causes additional resistance in the regular shunt-circuit, whereby the latter is weakened. For the above purpose the brake or lever V is connected, through the wires P", with the elcctrom agnets i and and the brake-wheel U with the binding-post l.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In an arc-lamp, the combination with the frame and the chain connecting and operating the carbons, of a grooved pulley sup porting said chain, a fulcrumed frame carrying said grooved pulley, an iron core on each side of the fulcrumed frame, a wire coil on one of said cores, two differentially-wound coils on the other core, an armature supported on one end of said fulcrumed frame and at right angles to said cores and adapted to be controlled thereby, a brake-wheel pivotally secured in the fulcrumed frame and parallel to the grooved pulley, gear connections between said brake-wheel and the grooved pulley and also carried by the fulcrumed frame, a brake fulcrumed in the frame and insulated therefrom and metallicallyconnected with the differentially-wound coils, and metallic connections between the wire coils and the brake-wheel, substantially as and for the purposes described.

2. In an arc-lamp, the combination with the frame and the chain connecting and operating the carbons, of a grooved pulley supporting said chain, a fulcrumed frame carrying said grooved pulley, an iron core on each side of the fulcrumed frame, a wire coil on one of said cores, two differentially-wound coils on the other core, an armature supported on one end of said fulcrum ed frame and at right angles to said cores and adapted to be controlled thereby, a brake-wheel pivotally secured in the fulcrumed frame and parallel to the grooved pulley, gear connections between said brake-wheel and the grooved pulley and also carried by the fulcrumed frame, abrake fulcrumed in the frame and insulated therefrom and metallically connected with the differentially-wound coils, spiral springs depending from the other end of the fulcrumed frame, adj listing-screws connected with said spiral springs, and metallic connections between the wire coils and the brake-wheel, substantially as and for the purposes described.

In testimony whereof I have hereto set my hand in the presence of the two undersigned witnesses.

AN OINE BUREAU.

Witnesses:

J. POHLEY, GREGORY PHELAN. 

